Door-operating mechanism



Jap. 6, 1931..

W. B. CROWELL ET AL DOOR OPERATING MECHANISM Original Filed Jan. l2, 1928 2 Sheets-Sheet l INVENTOR- RNEY.

Jams, 1931.

w. B. CROWELL ET AL 'DOOR OPERATNG MCHANISM Original Filed Jann l2. 1928 2 Sheets-Sheet 2 l filed `liatented Jan. 1931 UNIT-ED? STATES- OFFIQE WILIQIAMB. cnoWnLL, oF-Nnw Yorda.l N. spento csr-RUS vmassnrr, OMONTCLAIR, H'Ni-:vv JERSEY, Assreivoasfro nnnvaroasnrrmns coiriraivv,Juve.,l on HoBoKEN, NEW. JnRsEY,--A.coRroRAT1oN or NEW JERSEY j j Y i .noon-OPERATING MEcHAivIsivi Original applcationiled yJune 21, .1923, Serial No. 646,781. Divided 'andapplicaticn ledianuary|12, 1928, Siellal N0. 246,249. Divided and this applLtiQIt filed October 101925. Serial N0. 311,593.

This invention relates to a door-operating mechanism, 4and more particularly to a fluid pressure actuated deviceadapted for operating the toggle levers ofelevator doors and other mechanisms.

A general object of the present invention is to provide an improved and simplified power-actuated, mechanism 'for operating elevator doors and similar devices.

Another object of the invention is to provide an improved means for operating doors and the Ylike by means ofv fluid pressure, in which cushioning action shall be attained in both the opening and closing movements lof the device, and which shallbe adapted `tobe manually operated in case of failure ofpower or other contingency. y

Another object of the invention is to provide adoor operating mechanismin which the speed of operation of the device may be regulatedduring portions of the forward and return movements of the parts operated.

Another object of the invention is to-provide a. power-,operated mechanism having cushioning means which may be regulated to attain any desired amount of :cushioning during predetermined positions of the actuated mechanism. f

This application, which is a division of our copending application Serial No, 246,249, kJ an. 12, 1928, which. latter application is a division of application No. 646,781, filed June 21, 1923,' is directed to the species shown in Figs. 3, 4and 5 ofthe said col-pending Yapplication; the claims to this species `occurring therein having been canceled for re-presentas tion herein, in accordance with the election of the species of Fig. 2 of the co-pending application as the preferred form so farr as the claims in said application are concerned. The claims of the present application,therefore, are n directed to the species not claimed, although disclosed, in the aforesaid co-pending application.

`: With these objects in vievv,

the invention comprises the various Ifeatures hereinafter described and particularly defined 'in' the claimsf l' 'i The various features of the invention Will be 'describedin connection with the accompanying drawings, in which- Fig. l is a view showing the invention applied to the toggle levers of an elevator door. Fig. 2 isa horizontal section taken on the Fig` 3 is a vertical sectionalview of thedevice.v f

Fig. 4 is a` prolile-view, partly in section,

showing the cushioning regulating means v In Fig. `1 yof the drawings, a device embodying the invention, designated 'by numeral 10, is shownfas applied'in 4operative position `to the toggle vlevers 2, 3 of an elevator door 4,v which is mounted in the usual manner on roll Iers operating en an overhead track 5. By

the admission of fluid pressure to the operating cylinder 10, the toggle levers 2, 3 are fcrced upwardly causing a sliding movement Y Fig. 2of the aforesaid co-pending application VSerial No. 246,249. This form of the invention comprises a two-compartment cylinder casing having an upper and a lower casing joined together by means of a couplingV member 14. The cylindrical coinpartments `are closed by means of adjustable heads or caps, and joined thereto preferably lby means of screw-threaded connections. In

cel

10, is a piston to which is attached a piston rod which passes through an opening in the upper head, and is connected to the lever or mechanism to be operated. Surrounding' the piston rod isa helical spring which serves to return the door mechanism to closed position after operation yof the pistonvbyfluid pressurleg` Connected to the upper partk of the piston rod and enternalto the casing" l is a crosshead 100 forming a yoke with the sider'ods 102, 104,adapted. to mo'vefup and vdownwith.themovements ofthe piston andY piston rod. YIn the lowercasing 12`is a cup plunger 58 to which are rigidly attached side arms or extension arms 106, 108 "which extend outwardly through slots 110 and 112 inV thelower cylinder casing 12A and slidably engageV the 'red-S102' and' "104""respectively.

:Positioned upon thereciprocatory rods are twosetspof adjustable stops or .engagement blocks, the upper set 114, 116 serving to contactwith the extension arms 105,108 during the. downward stroke of ,the piston and side rodsfand theelowerfset 118, 120 serving to contact therewith during'the upward more- VV,mentof the. pistonand rods. During `the opening 'movement ofthe door, the piston, piston rod and sideV rods move upwardly and the side arms 106', l108.at,iirst'sliide upon the Y rods 102, 104;'leaving thecup plunger in its lower position until toward the end ofthe fstrole the stops 118, 120 engagethe extension armslOS, 108. Thecup'plungeris then lifted upwardly by'means of the stops and in A c'Jolperation with 'a stationaryplunger O 'serves to attainicushioning(action. During v the closing movement ofthe doorthepiston, piston rod and side rods' move downwardly and nlche extensionfarms 106, 108 slide upon the side rods 102, 'lOltduring'thefirstpart of thestroke, and toward the end of thestrolze fthe stops 114, 116 engage theside arms, forcing the cup plunger'downwardlyinto a cylindrical 'cup containing'oil or other liquid, 4by means of which checking lor cushioning action isfattain'ed at the end of the doorclosing movement.

In @the lower compartmentjof the device,

within the casing 12, are members which provide cushioning or checking action. A staytionary plunger 70 having passages/,124, 128

thereinfis 'attached' toY the partition 15 by means of plunger rod`l28 upon which' the plunger is. adj'ustably' attached by means of y screw-threaded connections.. A lock nut 129 is positioned upon the threaded portion'of theplunger rod 128 and serves to hold the plunger in any 'desired position.` iIn the lower portion of the ca`s1ng'12 is a cylindrical cup 22'which isk adapted for receiving the 'cup'plunger. The lower cylinder 12 is iilled with oil or other liquidto a levelV somewhat above the edge of thecup 22 forthe most satisfactoryY action, or theV levelof the liquid in theouter cup lower portion of the cup 22 is a passage shown more particularly in Fig. 4l of the drawings, through which the passage of liquid is controlled. In the side walls of the cup22 are passages 23, 23 through which oil willffiow when the cup plunger lirst passes into theoup, thus preventing as udden cushioning action. ln order also to prevent sudden "cushioning action', the sidewalls of 'the outer cylindricalcupmay be flared outwardly. near .the upper. portionithereof. In the walls of the movable cup plunger are orifices or passages at a height somewhat above the passages in the outer cup, and preferably at a" level corresponding to the flared portion ','when'the cup plunger is in its lowermostposition.4 V Y A vIn the operation ofthe power-operating `mechanism, cushioning effect may be made Ato take place at substantially -any desired portion ofthe strokeby positioning the lugs o r blocks at suitable positionson the vertical rods 102, 104 or by using a plunger of the through the openings 110 and 112. At theV Y proper length to give the desired effect at rthe end of the upward stroke,"and by vvarying theposition of thel cup 22 byr'suitably adjusting the positien of the loser head 20, or by employing a cup `22Uof al height to attain thedesired eiiect'. Cushioning action may therefore bema'de to take place'at any rdesiredpoint' ofthe forward or return stroke of the plunger, and by suitably regulating the passage of liquid'through theliquidpassageways the speed ofthe cushioning'action is; also controlled. By suitably regulating the pressure appliedto' the piston, any dcsiredspeed of action ofthe mechanism, togeth'e'r with cushioning at any predetermined part o f vtheforward and return strokes of the plunger, 'may' be attained.

It is to be understood I'that various changes or modifications may be made in the device described, as will be apparent to those skilled in the art, without departing fromthespirit or scope .of the invention.

, AThecushioning effect may be entirely con-v Vtrolled for example, by means of a` cup.

plungerhaving itsilowe'r exterior portion tapered., so that in passing into the cup 22 the movement of the plunger will be gradually. checked. The upper edge of the cup 22v may also be flared to attain any desired amount of cushioning action in the plunger stroke. The lower portion-of the plunger `70 is also preferably beveled or tapered,v and the corresponding interior wall of the cu plunger 58 is'flared so as to attain the. de'

lthe'desired cushioning action' could be at`x l i ie 'isc - tainedvvithout the use of liquid passages,

but it is preferable to employ the flared and beveled members in' combination with the `liquid passages having 'regulating meanspin order that'the cushioning speed may be regulated to attain the. desired speed of action in the cushioning' movements. i'

Claims: f

l, l; In a device of Jthe class described, a cyf piston in the other direction,

ing longitudinal slots therein, a cup plunger linder, a piston therein,means for operatively connecting'one of said parts to a mechanism to be operated, means for admitting pressurezluid to operate the piston in one direction, spring means for operating the av cylinder havin the said cylinderihaving arms extending throughsaid slots, side rods operatively7 coning said piston to the door, a retarding device ydistinct from said piston', means for applying power to Vsaid piston and piston vrod to' open the door, means for transmitting the movementof said piston to said retarding device comprising a pair of side rods lforming a yoke extending from said piston rod to said device', and means for returningsaid piston and side rods to their normal positions. f l

Signed at Hoboken in the county of Hudson and State of NeWJersey this 9th day of' October A. D. `1928. i WILLIAM B. cnoWELL. CYRUS VV. BASSETT.

nected to said piston and adapted to cooperate with s'aidarms to permit a sliding movement therein, stops on 'the rods to limit the y sliding movement of the arms thereon and to Cil cause operation of the said cup plunger, and

means operating With the plunger to cause Y cushioning action during'the movements of the said plunger.

2. In a device ofthe class described, a cylinder, a piston therein, means for connecting one of said parts to a mechanism to be operated, side rodsoperatively connected to said piston, a cup plunger, means4 slidably connecting the said plunger means operatively connected to the rods'to limit the sliding movement of the said arms thereon, a stationary plunger operating With;V

said cup plunger to attain cushioning-action in the movement of the plunger in one direction, and a cup operating with said cup plunger yto attain cushioning action inthe movement of the plunger in the other direction, and means for maintaining aliquid between the cushioning parts.

3. In a device of the class described, a` cyto said rods,V

' ico linder` a piston therein, a piston rod conting the movement ofsaid piston to said retarding plunger comprising a pair of side rods forming a yoke extending from said piston rod to said plunger, and spring means for returning said piston and side rods to their normal positions.

5. In a device of the class described, a cylinder, a piston therein, a piston rod connect- 

